公开(公告)号：AU640561B2

公开(公告)日：1993-08-26

申请号：AU1295792

申请日：1992-03-17

Applicant: QUALCOMM, INC

Inventor： KLEIN S GILHOUSEN ,  FRANKLIN P ANTONIO ,  IRWIN M JACOBS ,  LINDSAY A WEAVER JR.

IPC: G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H01S3/08 ,  H01S5/14 ,  H01S5/40 ,  H04B1/7136 ,  H04B7/212 ,  H04B10/155 ,  H04L5/16

Abstract: A message communication system employing one or more centralized communication stations transferring messages through Earth orbit repeater satellites to or from mobile terminals with at least one central communication station having a first transceiver for transmitting a first communication signal to one or more mobile terminals and at least one mobile terminal having a second transceiver for receiving the first communication signal and demodulating it, and for transmitting at a predetermined duty cycle of the second transceiver, a second communication signal to at least one of the central communication stations. The preferred duty cycle over which the second communication signal is transmitted is about fifty percent of the second transceiver duty cycle. The communication system uses Time Division Multiplexed (TDM) communication signals using a number of channels as designated address channels with the remainder being used for data transfer. Information transmitted on the address channels is used by terminals to determine both the presence of a message and its corresponding data transmission or reception channel. In addition the terminals use the reception of the first communication signal to adjust return link transmission frequency to compensate for transmission path errors. The alternating duty cycle allows mobile terminals to use a single set of local oscillators for both transmission and reception modes of operation. To decrease interference with other systems the present system employs a power dispersal modulation function to achieve the footprint of a video signal for high transfer rate digital communication signals.

公开(公告)号：HK1042193B

公开(公告)日：2004-06-25

申请号：HK02103872

申请日：2002-05-23

Applicant: QUALCOMM INC

Inventor： FRANKLIN P ANTONIO ,  WALID HAMDY

IPC: H04B7/005 ,  H04B7/26 ,  H04W28/26 ,  H04W52/34

公开(公告)号：RU2107989C1

公开(公告)日：1998-03-27

申请号：RU95109926

申请日：1994-08-24

Applicant: QUALCOMM INC

Inventor： RICHARD F DIN ,  FRANKLIN P ANTONIO ,  KLEJN S GILKHAUSEN ,  CHARLZ I UITLI III

IPC: H04B7/04 ,  H01Q21/29 ,  H04B7/02 ,  H04B7/06 ,  H04B7/08 ,  H04B7/26 ,  H04W36/18 ,  H04W88/08

Abstract: FIELD: antenna engineering. SUBSTANCE: each antenna assembly has more than one antenna. Each antenna of assembly ensures formation of channel passing signals at delay other than that in other channels. EFFECT: facilitated signal separation to improve system characteristics. 47 cl, 11 dwgs